diff --git a/tests/atomics-7.ispc b/tests/atomics-7.ispc
index c32f52dd..ec34ba8c 100644
--- a/tests/atomics-7.ispc
+++ b/tests/atomics-7.ispc
@@ -1,14 +1,14 @@
 
 export uniform int width() { return programCount; }
 
-uniform int64 s = 0;
+uniform int32 s = 0;
 
 export void f_f(uniform float RET[], uniform float aFOO[]) {
-    float a = aFOO[programIndex]; 
-    float b = atomic_add_global(s, 1);
-    RET[programIndex] = reduce_add(b);
+    int32 a = aFOO[programIndex]; 
+    float b = atomic_min_global(s, a);
+    RET[programIndex] = reduce_min(b);
 }
 
 export void result(uniform float RET[]) {
-    RET[programIndex] = reduce_add(programIndex);
+    RET[programIndex] = reduce_min(programIndex);
 }
diff --git a/tests/atomics-8.ispc b/tests/atomics-8.ispc
index ec34ba8c..93dda6ac 100644
--- a/tests/atomics-8.ispc
+++ b/tests/atomics-8.ispc
@@ -5,10 +5,12 @@ uniform int32 s = 0;
 
 export void f_f(uniform float RET[], uniform float aFOO[]) {
     int32 a = aFOO[programIndex]; 
-    float b = atomic_min_global(s, a);
-    RET[programIndex] = reduce_min(b);
+    int32 b = 0;
+    if (programIndex & 1)
+        b = atomic_max_global(s, a);
+    RET[programIndex] = s;
 }
 
 export void result(uniform float RET[]) {
-    RET[programIndex] = reduce_min(programIndex);
+    RET[programIndex] = programCount;
 }